All Discussions Tagged 'ESP' - Home Energy Pros2015-03-03T23:20:56Zhttp://homeenergypros.lbl.gov/group/1000homechallenge/forum/topic/listForTag?tag=ESP&feed=yes&xn_auth=noCFM Per Watt – How Do Your Air Handler Systems Perform?tag:homeenergypros.lbl.gov,2011-09-01:6069565:Topic:572582011-09-01T04:11:15.732ZLinda Wigingtonhttp://homeenergypros.lbl.gov/profile/Linda
<p><span style="color: #0000ff;"><em>Slides 38 - 42 show data from 55 duct systems - Air handler performance varies from 6.5 to 2 CFM Per Watt</em></span></p>
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<p>Forced air distribution systems–ducts–can contribute to unanticipated energy use in a variety of ways: through duct leakage, pressure effects, conductive and radiant heat gain, and insufficient airflow. Ducts provide a great opportunity to demonstrate system effects.</p>
<p>Often,…</p>
<p><span style="color: #0000ff;"><em>Slides 38 - 42 show data from 55 duct systems - Air handler performance varies from 6.5 to 2 CFM Per Watt</em></span></p>
<p><span style="color: #0000ff;"><em> </em></span></p>
<p>Forced air distribution systems–ducts–can contribute to unanticipated energy use in a variety of ways: through duct leakage, pressure effects, conductive and radiant heat gain, and insufficient airflow. Ducts provide a great opportunity to demonstrate system effects.</p>
<p>Often, when one part of the system is addressed, unanticipated problems may occur. ECM motors appear to offer significant efficiency and performance improvements over the old PCS motors that have been the workhorses for heating and cooling equipment for years.</p>
<p> As part of routine inspections through the Performance Tested Comfort System program, (<a href="http://ptcsnw.com">http://ptcsnw.com</a>) Mark Jerome (KAM Energy, Roseburg, Oregon) collected measured airflow and amp draw data on 55 systems that he was installing or inspecting. The attached PDF is his presentation of that data, given this July at Data, Not Dogma, in Goldendale, Washington. One thing to note is that these systems were installed by trained contractors as part of a program that has a focus on performance. One may suspect wider diversity of results in a sample of installations outside of the program’s influence.</p>
<p>It takes energy to move air. What are the implications for the design and installation of new space conditioning systems? What happens when we install central cooling and ECM motors into pre-existing duct systems? What are potential unexpected consequences of furnace filter replacement and duct sealing in systems with ECM motors?</p>
<p>In Thousand Home Challenge projects, the energy it takes to move air in combustion venting systems, spot and central ventilation, as well as heating and cooling can be a significant portion of a home’s threshold allowance. It is critical to reexamine our assumptions: how can we achieve exceptional air quality and comfort at a fraction of the energy used in most homes today?</p>
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<p>Share your data so we can better understand the opportunity to reduce the energy use of blowers and fans.</p>
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